diff --git a/extras/doc/AccelStepper_8h-source.html b/extras/doc/AccelStepper_8h-source.html
index 098f9f5..6e5ed46 100644
--- a/extras/doc/AccelStepper_8h-source.html
+++ b/extras/doc/AccelStepper_8h-source.html
@@ -380,7 +380,7 @@ <h1>AccelStepper.h</h1><div class="fragment"><pre class="fragment"><a name="l000
 <a name="l00365"></a>00365 <span class="comment"></span>    <span class="keywordtype">float</span>          _maxSpeed;
 <a name="l00366"></a>00366 <span class="comment"></span>
 <a name="l00367"></a>00367 <span class="comment">    /// The acceleration to use to accelerate or decelerate the motor in steps</span>
-<a name="l00368"></a>00368 <span class="comment">    /// per second per second. Must be &gt; 0</span>
+<a name="l00368"></a>00368 <span class="comment">    /// per second. Must be &gt; 0</span>
 <a name="l00369"></a>00369 <span class="comment"></span>    <span class="keywordtype">float</span>          _acceleration;
 <a name="l00370"></a>00370 <span class="comment"></span>
 <a name="l00371"></a>00371 <span class="comment">    /// The current interval between steps in microseconds</span>
diff --git a/extras/doc/classAccelStepper.html b/extras/doc/classAccelStepper.html
index fec3900..466336a 100644
--- a/extras/doc/classAccelStepper.html
+++ b/extras/doc/classAccelStepper.html
@@ -726,7 +726,7 @@ <h2 class="memtitle"><span class="permalink"><a href="#adfb19e3cd2a028a1fe781317
 </div><div class="memdoc">
 <p>Sets the acceleration/deceleration rate. </p><dl class="params"><dt>Parameters</dt><dd>
   <table class="params">
-    <tr><td class="paramdir">[in]</td><td class="paramname">acceleration</td><td>The desired acceleration in steps per second per second. Must be &gt; 0.0. This is an expensive call since it requires a square root to be calculated. Dont call more ofthen than needed </td></tr>
+    <tr><td class="paramdir">[in]</td><td class="paramname">acceleration</td><td>The desired acceleration in steps per second. Must be &gt; 0.0. This is an expensive call since it requires a square root to be calculated. Dont call more ofthen than needed </td></tr>
   </table>
   </dd>
 </dl>
diff --git a/src/AccelStepper.h b/src/AccelStepper.h
index 42ee37d..b34dd23 100644
--- a/src/AccelStepper.h
+++ b/src/AccelStepper.h
@@ -437,8 +437,8 @@ class AccelStepper
     float   maxSpeed();
 
     /// Sets the acceleration/deceleration rate.
-    /// \param[in] acceleration The desired acceleration in steps per second
-    /// per second. Must be > 0.0. This is an expensive call since it requires a square 
+    /// \param[in] acceleration The desired acceleration in steps per second.
+    /// Must be > 0.0. This is an expensive call since it requires a square 
     /// root to be calculated. Dont call more ofthen than needed
     void    setAcceleration(float acceleration);
 
@@ -684,7 +684,7 @@ class AccelStepper
     float          _maxSpeed;
 
     /// The acceleration to use to accelerate or decelerate the motor in steps
-    /// per second per second. Must be > 0
+    /// per second. Must be > 0
     float          _acceleration;
     float          _sqrt_twoa; // Precomputed sqrt(2*_acceleration)